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Received August 23, 2023
Accepted August 23, 2023
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Direct conversion of cellulose into polyols or H2 over Pt/Na(H)-ZSM-5

Division of Energy Systems Research and Division of Chemical Engineering and Materials Engineering, Ajou University, San 5 Woncheon-dong, Yeongtong-gu, Suwon 443-749, Korea 1Korea Research Institute of Chemical Technology, Sinseongno 19, Yuseong-gu, Daejeon 305-600, Korea 2SK Energy Institute of Technology, Wonchon-dong, Yuseong-gu, Daejeon 305-712, Korea
edpark@ajou.ac.kr
Korean Journal of Chemical Engineering, March 2011, 28(3), 744-750(7), 10.1007/s11814-011-0019-3
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Abstract

The direct conversion of cellulose into polyols such as ethylene glycol and propylene glycol was examined over Pt catalysts supported on H-ZSM-5 with different SiO2/Al2O3 molar ratios. The Pt dispersion, determined by CO chemisorption and transmission electron microscopy (TEM), as well as the surface acid concentration measured by the temperature-programmed desorption of ammonia (NH3-TPD), increased with decreasing SiO2/Al2O3 molar ratio for Pt/H-ZSM-5. The total yield of the polyols, i.e., sorbitol, manitol, ethylene glycol and propylene glycol, generally_x000D_ increased with increasing Pt dispersion in Pt/H-ZSM-5. The one-pot aqueous-phase reforming of cellulose into H2 was also examined over the same catalysts. The Pt catalyst supported on H-ZSM-5 with a moderate SiO2/Al2O3 molar ratio and a large external surface area showed the highest H2 production rate. The Pt dispersion, surface acidity, external surface area and surface hydrophilicity appear to affect the catalytic activity for this reaction.

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